{"id":1105,"date":"2022-07-21T13:06:05","date_gmt":"2022-07-21T05:06:05","guid":{"rendered":"http:\/\/blog.xtaa.cn\/?p=1105"},"modified":"2022-07-21T13:06:05","modified_gmt":"2022-07-21T05:06:05","slug":"nat%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/blog.xtaa.cn\/index.php\/2022\/07\/21\/nat%e7%b1%bb%e5%9e%8b\/","title":{"rendered":"NAT\u7c7b\u578b"},"content":{"rendered":"\n

\u4e0b\u8f7d\u5e76\u8fd0\u884c\u300aNatTypeTester\u300b\uff0c\u56e0\u5de5\u5177\u539f\u5730\u5740\u5df2\u5931\u6548\uff0c\u5c06STUN server\u680f\u4e2d\u7684\u5730\u5740\u4fee\u6539\u6210\u201cstun.voipbuster.com\u201d\u6216\u8005stun.qq.com\uff0c\u70b9\u51fb\u201cGET\u201d\u5373\u53ef\u6d4b\u8bd5\u7c7b\u578b\u3002<\/p>\n\n\n\n

<\/p>\n\n\n\n

1. Full Cone NAT<\/strong>:NAT1\u5c06\u6765\u81ea\u540c\u4e00\u4e2a\u5185\u90e8\u5143\u7ec4X\u7684\u7684\u6240\u6709\u8bf7\u6c42\u8f6c\u6362\u4e3a\u540c\u4e00\u4e2a\u5916\u90e8\u5143\u7ec4Y\uff0c\u65e0\u8bba\u8fd9\u4e9b\u8bf7\u6c42\u5c5e\u4e8e\u540c\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u8fd8\u662f\u591a\u4e2a\u5e94\u7528\u7a0b\u5e8f\u3002\u6b64\u5916\uff0c\u5f53X-Y\u8f6c\u6362\u5173\u7cfb\u5efa\u7acb\u540e\uff0c\u4efb\u4f55\u5916\u90e8\u4e3b\u673a\u90fd\u53ef\u4ee5\u968f\u65f6\u4f7f\u7528Y\u4e2d\u7684\u5730\u5740\u548c\u7aef\u53e3\u4f5c\u4e3a\u76ee\u6807\u5730\u5740\u548c\u7aef\u53e3\uff0c\u5411\u5185\u90e8\u4e3b\u673a\u53d1\u9001UDP\u6d88\u606f\u3002\u56e0\u4e3a\u5bf9\u5916\u90e8\u8bf7\u6c42\u7684\u6765\u6e90\u6ca1\u6709\u9650\u5236\uff0c\u6240\u4ee5\u8fd9\u4e2a\u65b9\u6cd5\u8db3\u591f\u7b80\u5355\uff0c\u4f46\u662f\u4e0d\u90a3\u4e48\u5b89\u5168\u3002(\u4efb\u4f55\u5916\u90e8\u4e3b\u673a\/\u7aef\u53e3\u90fd\u53ef\u4ee5\u4e0e\u524d\u4e00\u4e2a\u5185\u90e8\u8282\u70b9\u6620\u5c04\u5230\u7684\u5916\u90e8\u5143\u7ec4\u901a\u4fe1)<\/p>\n\n\n\n


2.Restricted Cone NAT:<\/strong>\u5b83\u662fFull Cone\u7684\u53d7\u9650\u7248\u672c\uff1a\u6765\u81ea\u540c\u4e00\u4e2a\u5185\u90e8\u5143\u7ec4X\u7684\u7684\u6240\u6709\u8bf7\u6c42\u90fd\u88abNAT\u8f6c\u6362\u4e3a\u540c\u4e00\u4e2a\u5916\u90e8\u5143\u7ec4Y\uff0c\u4e0eFull
Cone\u76f8\u540c\uff0c\u4f46\u4e0d\u540c\u7684\u662f\u53ea\u6709\u5f53\u5185\u90e8\u4e3b\u673a\u5df2\u7ecf\u5411\u5916\u90e8\u4e3b\u673a\u53d1\u9001\u4e86\u6d88\u606f(\u5047\u8bbe\u5176IP\u5730\u5740\u4e3aZ)\u65f6\uff0c
\u5916\u90e8\u4e3b\u673a\u53ef\u4ee5\u4ee5Y\u4e2d\u7684\u4fe1\u606f\u4f5c\u4e3a\u76ee\u6807\u5730\u5740\u548c\u7aef\u53e3\u5411\u5185\u90e8\u4e3b\u673a\u53d1\u9001UDP\u8bf7\u6c42\u6d88\u606f\uff0c\u8fd9\u610f\u5473\u7740NAT\u8bbe\u5907\u53ea\u8f6c\u53d1(\u8f6c\u6362\u76ee\u6807\u5730\u5740\/\u7aef\u53e3)\u90a3\u4e9b\u6765\u81ea\u5f53\u524d\u5df2\u77e5\u5916\u90e8\u4e3b\u673a\u7684UDP\u6d88\u606f\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u5916\u90e8\u8bf7\u6c42\u6e90\u7684\u5b89\u5168\u6027\u3002
(IP\u76f8\u540c\uff0c\u7aef\u53e3\u4efb\u610f\uff0c\u53ef\u4ee5\u4e0e\u524d\u4e00\u4e2a\u5185\u90e8\u8282\u70b9\u6620\u5c04\u5230\u7684\u5916\u90e8Tuple\u901a\u4fe1)<\/p>\n\n\n\n

Port Restricted Cone NAT\uff08<\/strong>NAT3<\/strong>\uff09<\/strong><\/p>\n\n\n\n

\u7aef\u53e3\u53d7\u9650\u9525\u578bNAT\uff0c\u76f8\u6bd4NAT2\uff0cNAT3 \u53c8\u589e\u52a0\u4e86\u7aef\u53e3\u9650\u5236\uff0c\u4e5f\u5c31\u662f\u8bf4IP\u3001\u7aef\u53e3\u90fd\u4f1a\u53d7\u9650\u3002<\/p>\n\n\n\n


Symmetric NAT(<\/strong>NAT4<\/strong><\/strong>) <\/strong><\/p>\n\n\n\n

\u5bf9\u79f0\u578bNAT\uff0c\u5177\u6709\u7aef\u53e3\u53d7\u9650\u9525\u578b\u7684\u53d7\u9650\u7279\u6027\uff0c\u5185\u90e8\u5730\u5740\u6bcf\u4e00\u6b21\u8bf7\u6c42\u4e00\u4e2a\u7279\u5b9a\u7684\u5916\u90e8\u5730\u5740\uff0c\u90fd\u53ef\u80fd\u4f1a\u7ed1\u5b9a\u5230\u4e00\u4e2a\u65b0\u7684\u7aef\u53e3\u53f7\u3002\u4e5f\u5c31\u662f\u8bf7\u6c42\u4e0d\u540c\u7684\u5916\u90e8\u5730\u5740\u6620\u5c04\u7684\u7aef\u53e3\u53f7\u662f\u53ef\u80fd\u4e0d\u540c\u7684\u3002\u8fd9\u79cd\u7c7b\u578b\u57fa\u672c\u4e0a\u5c31\u544a\u522b P2P \u4e86\u3002<\/p>\n\n\n\n


\u7531\u4e0a\u9762\u53ef\u4ee5\u770b\u51fa\u4eceNAT1\u5230NAT4\u9650\u5236\u8d8a\u6765\u8d8a\u591a\uff0c\u4e3a\u4e86\u5404\u79cd\u9700\u6c42\uff0c\u6211\u4eec\u5e0c\u671b\u63d0\u5347NAT\u7c7b\u578b\u3002\u63d0\u5347NAT\u7c7b\u578b\u7684\u597d\u5904\u6709\uff0c\u6d4f\u89c8\u7f51\u9875\u3001\u89c2\u770b\u89c6\u9891\u3001\u6e38\u620f\u7b49\u66f4\u987a\u7545\uff0c\u4e0b\u8f7d\u901f\u5ea6\u66f4\u7a33\u5b9a\u5feb\u901f\uff0c\u5c24\u5176\u662f\u5bf9\u559c\u6b22\u73a9\u6e38\u620f\u7684\u7528\u6237\uff0c\u63d0\u5347NAT\u7c7b\u578b\u540e\u66f4\u5bb9\u6613\u8fdb\u5165\u6e38\u620f\u623f\u95f4\u8fde\u7ebf\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e0b\u8f7d\u5e76\u8fd0\u884c\u300aNatTypeTester\u300b\uff0c\u56e0\u5de5\u5177\u539f\u5730\u5740\u5df2\u5931\u6548\uff0c\u5c06STUN server\u680f\u4e2d\u7684\u5730\u5740\u4fee\u6539\u6210\u201cstu […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1105","post","type-post","status-publish","format-standard","hentry","category-11"],"_links":{"self":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/1105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1105"}],"version-history":[{"count":0,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/1105\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1105"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}